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HTTP 407 Proxy Authentication required - The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. (12209)

Posted on 2009-04-14
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Last Modified: 2012-06-27
I moved from old ISA 2000, to ISA 2004, so internet was fine only with admin login not with other users and the screen for username and password keep popping and an error comes with

HTTP 407 Proxy Authentication required - The ISA Server requires authorization to fulfill the request. Access to the Web Proxy service is denied. (12209)
Internet Security and Acceleration Server
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Question by:ssalim1
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by:hau_it
ID: 24145189
I think that you should change the authentication to windows integrated from Configuration-Networks-Internal-Web Proxy tab - authentication button

After that in the HTTP rule that you created to allow internet access you must specify the group of users that are permitted to use the Proxy service

Dimitris
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Author Comment

by:ssalim1
ID: 24145546
now the internal interface doesnt take any IP, as well as doesnt take any IP from DHCP, and not able to ping anything inside, only outside is working
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Expert Comment

by:hau_it
ID: 24145561
If this a server why should use dynamic IP addresses? Try to give him a static IP.
In order to be able to ping from the ISA server you should enable the ICMP and specify where the server can ping. By default the ISA blocks all traffic.
Create a rule in the ISA to allow http from the internal to external network. Remember always that ISA blocks all traffic!!
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Author Comment

by:ssalim1
ID: 24145958
even when i put static it doent ping anything inside, thats why i try dynamic and keep searching for IP and it doesnt take any IP address.
also i added new network card and till doesnt take IP, which it was before.
shall i format the server ???
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Expert Comment

by:hau_it
ID: 24145977
no you do not have to format the server.
I think that you should understand how the ISA works.
As i told you before by default ISA blocks all traffic, and you have to create rules to permit traffic through ISA.
Also you have to specify the network ranges for the internal (trusted network). Everything that it is not trusted it is the external network.
There is a very good site the isaserver.org that has a lot of information about ISA configuration.
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Author Comment

by:ssalim1
ID: 24146039
ok, I stopped all the isa server services, and connect the server to the network and still doesnt get the ip, as i need to join it to the domain as well...!!!!!!!!
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Expert Comment

by:hau_it
ID: 24146050
backup the ISA configuration and try to uninstall the application. See if after that you can get IP address. If not then there is something else and not the ISA
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Author Comment

by:ssalim1
ID: 24146128
ok, after un installing ISA application the server got IP address, could you send me a link for step by step isa installation or shall i restore the backup... thanks
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Author Comment

by:ssalim1
ID: 24146149
also where i can download ISA 2004?
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Expert Comment

by:hau_it
ID: 24146165
if rou search the internet there are many sites with information about isa installation.
If you start the wizard try to be very careful with the internal and external network.
Internal is your LAN and External is whatever is not in your LAN.
When you finish the installation go to the configuration page and select the correct topology depending on the your network infrastructure.

You can always buy the ISA 2004 server or you can download a free 180 trial from microsoft.com
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Author Comment

by:ssalim1
ID: 24146223
could u send me the link for downloading isa 2004 from microsoft.com as i only can find the service packs..
thanks
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hau_it earned 500 total points
ID: 24146252
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Author Comment

by:ssalim1
ID: 24146260
thanks got it
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